669637108 has 24 divisors (see below), whose sum is σ = 1370422592. Its totient is φ = 280312704.

The previous prime is 669637099. The next prime is 669637109. The reversal of 669637108 is 801736966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669637109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276885 + ... + 279292.

Almost surely, 2^669637108 is an apocalyptic number.

It is an amenable number.

669637108 is an abundant number, since it is smaller than the sum of its proper divisors (700785484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669637108 is a wasteful number, since it uses less digits than its factorization.

669637108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556231 (or 556229 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 669637108 is about 25877.3473911064. The cubic root of 669637108 is about 874.8760022384.

The spelling of 669637108 in words is "six hundred sixty-nine million, six hundred thirty-seven thousand, one hundred eight".